If Pack No. 2 fails, the following occurs:

• Pack flow control valve No. 1 will move to a higher flow position, regardless of the Pack Flow Selector setting.
• Pack flow control valve No. 2 will close.
• Cabin Trim Air Valves (both FWD and AFT) will close.
• Cockpit temperature control remains normal, but cabin temperature will be fixed.

Note: The Air Conditioning System Controller 2 regulates the temperature for the two cabin zones, while the Air Conditioning System Controller 1 manages the cockpit temperature.